The enigma: a discovery at Rennes-le-Château that offers little in the way of material wealth, but whose secret rocked the foundations of contemporary politics and the Christian faith. The players: the Knights Templar, the Cathar heretics of the twelfth and thirteenth centuries and a dynasty of obscure French kings deposed more than 1,300 years ago. The conclusion: as persuasive, controversial and explosive as it was when first published over twenty years ago.